Any one know where I can get some speed stuff for the 151 Iron Duke. I'm looking for Cams, Intakes, Headers and Carbs. Cheers, Stewart.
I made my own Weber side-draft intake and am about to weld-up the lakes-style header. I have CAD outlines ("dwg" files) of the different components if you can use them. I can send them Email.
I had an iron duke from a boat and I saved the head and intake from it. Someone else here on the HAMB carved up one of the boat intakes to eliminate the water p***ages so it'd be an intake only, mounts a 2CG on it. Also, the marine motors have the coolest finned aluminum valve cover for the 4 banger that I've ever seen. The marine motor was rated at 120 hp, so I would guess the marine head, a marine cam, a cut down intake and a homemade header would make decent power.
my buddy ran one on a pulling tractor ....2.5 pontiac super duty ..was pretty *****in with a 4-71 on it with a hat... ...edelbrock made intakes ....he was running a mallory mag ....header might be a custom deal....think he had his cam done by bullet or lazer....might also look into offy on the intake..... brandon
dont confuse the 153 chevy 11/ mercrusier / midget racer engine with the 151 monza type motor the 151was coined the iron duke by gm.
My '79 Monza parts car came with a progressive two barrel carb on the 151. I think it would be very easy to adapt a standard two bbl carb to it. The '79-'80 engines had crossflow heads and non computer HEI ign. Clifford (6=8) made intakes for the Iron Duke.
Chevy ll motor was 153 cubes and built from 1962-70. Mercruiser marine and OMC used the same block with a crossflow head and were 181 cubes. The Iron Duke came along in the 70's after the chevy ll motor. Parts don't interchange as a rule. The chevy ll banger motor I used in my 27 T tub was a 65 one out of a chevy van. Pat.
You could do what these guys did. They adapted a 392 Hemi head from Hotheads onto the iron duke, if your pockets are that deep anyway.
From an old Complete book Of Chevy by Petertson Publishing .GM sold the rights and tooling for the Chevy II 4 cylinder Engine to Mercury Marine when GM dropped this motor,At the same time selling Rover the tooling for the little Buick V8 .They later bought the rights back from Mercury to replace the Vega 4 with all its problems. A new cross flow head was developed by GM.Thats why the finned Mercury covers fit the car motor.The marine cam was a hop up item for these motors early on.For the New England guys do any of you remember a 63 Chevy II that ran under the name "Mystery 4" it ran at Epping and Ct. Dragway the guy that built that car had a wall full of trophies he won with a hot GM 4 cylinder He had a head custom made from SBC heads .
Good catch, if you look at the writing on the block it's backwards on the previous page , the image has been flipped over. I fixed it in this picture.
Thats a 2.5 Super Duty block they got a whole lotta room for modifications that you can't do to a production line mill!but I'd sure like to know the details of fitting that head! it would be kick *** to pop the hood on an s10 or something and show the super rare Hemi option from Canada!Do you have pics of the other side of that?
The bore spacing was off some, (.090") but the head was centered to fit. I don't know anymore specifics off that engine, I found it on a website that I don't remember that was building these engines .
I'm confused(sorta) How can you tell a 153 (Chevy II) apart from a 151(Iron duke) and a 181(boat motor) by "just looking" ??? Am I safe to ***ume my old Postal Jeep ch***is 4 banger is probably an Iron duke? And Mercruiser stuff will fit? Oh Lord...... Maybe I'll put a 331 Cad in the RPU.......
I think the easiest way to tell a 153 from 151 is by the location of the distributor. The 153 distributor is driven by the same gear that drives the oil pump. The distributor is therefore located toward the front of the engine. The 151 distributor is not driven by the same gear. It is located about 2/3 back on the engine, closer to the bellhousing than the front of the engine. I think all the Iron Dukes had electronic ign. My '79 Monza had a large diameter HEI. The cap was like a V8 cap with every other tower not drilled. The coil mounted in the cap. My '84 Fiero had a small diameter HEI with no vacuum advance and was controlled by the computer. Later engines had no distributor, only coil paks and had crank sensors so the computer totally controlled the ign.
That super duty 4cyl. has a Hot Heads aluminum cyl. head and valve cover. I remember calling Bob at Hot Heads about this mill and he said (If I remember right) that it was Nick Arias project of some sort. I bet if you called him you could learn more. I've also heard rumors of using a Desoto Hemi head on one of the GM fours. Would be an awesome bonneville engine on fuel with a blower of some sort. But George Fields kind of has that market blown out of the water with his Nitro burning "half Hemi" in the Simca coupe.
Hey, look closely. That's not an Iron Duke, it's an Aluminum Duke. Seriously, that's definitely some type of aftermarket block and not an OEM Iron Duke. Bob
The Pontiac super duty " iron Duke" was available on many configurations, steel, aluminum, different strokes, etc. There is a little bit of interchangability with the sixties "Iron Duke" motor so it can get a little confusing.The guys running midgets really have a handle on these things, and they are still fairly compe***ive, parts are on ebay all the time, and of course on the racing cl***ifieds as well. Have one in my T modified, as well as in a Stanton/Challerger sprint car toy that should be running this week.
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